With its heat sensitive structure, it takes the shape of the head and neck area and adapts to the body. poly & cotton knitted fabric is used. it is produced with open cell technology. it does not sweat as there is air flow between the channels during the night. 52 dns visco is used. harmful cfc (chloro fluoro carbon) product size: 60x40x(11/10) cmwashing instruction:no bleaching.no drying.dry cleaning is not applicable. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.